I'm no stranger to the problems with copper freezing. This year I dealt with over a dozen homes that are total losses due to frozen copper piping that later thawed and flooded the home. I handled Dozens upon dozens of thawing calls on copper and pex.

They both have their place, and its great that pex doesn't burst once it freezes, but holy shit do I ever hate having to track down where a pex line is frozen. Track builders keep running them behind the vapor barrier somehow and homeowners are surprised when they freeze.

Even better, don't put pex in a place where it can freeze. At least copper can be electrically thawed as long as you can attach on either side of it. Thawing pex on the other hand requires a drywall saw, a hairdryer, and patience.

Yup, the normal driver is green. Even the VDE set is properly colour coded. I guess they decided not to colour code the stainless drivers as they are a specialty item. Also, You can't see it in the picture, but the stainless drivers have a coloured stamp on the top of the handle that indicate the size.

In Ontario the MAESD oversees the apprenticeship program and will credit hours for post secondary training depending on relevance. I've seen up to 2 years (4400 hrs) credited before. You'll still be required to do all levels of classroom training.

Most municipalities in north america are deploying cross connection control (backflow) programs to prevent hazardous liquids from entering the drinking water system in order to prevent incidents like this.